Change font color in OpenXML word document (C#)

Question

I\'ve been searching for hours and I just can\'t seem to find a solid answer for this. I have an existing document with content controls that I need to edit the text in with ex

Answer 1

I had the need for something very similar to the OP in the sense that I had a whole bunch of plain text and other controls in a word document template which I was populating at runtime. I created an extension method to set text and other formatting bits and bobs. Hopefully this will help anyone who comes here in need like I did:

    public static void ReplaceText(this SdtElement element, string replacementText, bool? isBold = null, bool? isItalic = null, System.Drawing.Color? color = null, VerticalPositionValues? textVerticalType = null, int? fontSizeComplexScript = null)
    {

        // First try to get content blocks from the element
        IEnumerable childContentBlocks = element.ChildElements.OfType();

        //Function to generate the new run properties
        RunProperties SetupNewRunProperties(RunProperties oldRunProps) { 

            var props = new RunProperties();

            if (fontSizeComplexScript.HasValue && fontSizeComplexScript.HasValue)
                props.FontSizeComplexScript.Val = fontSizeComplexScript.ToString();
            else if (oldRunProps?.FontSizeComplexScript != null)
                props.FontSizeComplexScript = (FontSizeComplexScript)oldRunProps.FontSizeComplexScript.CloneNode(true);

            if (isBold.HasValue) 
                props.Bold.Val = OnOffValue.FromBoolean(isBold.Value);
            else if(oldRunProps?.Bold != null)
                props.Bold = (Bold)oldRunProps.Bold.CloneNode(true);

            if (isItalic.HasValue)
                props.Italic.Val = OnOffValue.FromBoolean(isItalic.Value);
            else if (oldRunProps?.Italic != null)
                props.Italic = (Italic)oldRunProps.Italic.CloneNode(true);

            if (textVerticalType.HasValue)
                props.VerticalTextAlignment.Val = textVerticalType.Value;
            else if (oldRunProps?.VerticalTextAlignment != null)
                props.VerticalTextAlignment = (VerticalTextAlignment)oldRunProps.VerticalTextAlignment.CloneNode(true);

            if (color.HasValue)
            {
                if (props.Color != null)
                    props.Color.Val = color.Value.ToHexString();
                else
                    props.Color = new Color() { Val = color.Value.ToHexString() };
            }
            else if (oldRunProps?.Color != null)
            {
                props.Color = (Color)oldRunProps?.Color.CloneNode(true);
            }

            return props;
        }

        if (childContentBlocks.Count() > 0)
        {
            SdtContentBlock contentBlock = childContentBlocks.First();
            Paragraph para = contentBlock.ChildElements.OfType().First();
            if (para != null)
            {
                Run run = para.GetFirstChild();

                run.RunProperties = SetupNewRunProperties(run.RunProperties);

                Text text = run.GetFirstChild();
                text.Text = replacementText;
            }
        }
        else
        {
            // Instead, try to get content runs from the element
            IEnumerable childContentRuns = element.ChildElements.OfType();

            if (childContentRuns.Count() > 0)
            {
                Run run = childContentRuns.First().GetFirstChild();

                run.RunProperties = SetupNewRunProperties(run.RunProperties);

                Text text = run.GetFirstChild();
                text.Text = replacementText;
            }
        }

    }